<template>
  <view v-if="cart.length !== 0">
    <!-- 收获地址 -->
    <my-address></my-address>

    <!-- 购物车标题区域 -->
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>

    <!-- 购物车列表 -->
    <!-- #3 父亲监听 radio-change 事件 -->
    <uni-swipe-action>
      <block v-for="(item, i) in cart" :key="i">
        <uni-swipe-action-item :rightOptions="rightOptions" @click="swipeActionClickHandler(item)">
          <my-goods @radio-change="radioChangeHandler" :goods="item" :show-radio="true" :show-num="true"
            @num-change="numberChangeHandler">
          </my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>

    <!-- 结算栏 -->
    <my-settle></my-settle>

    <!-- 空白购物车区域 -->
    <view>购物车空白区</view>
  </view>
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import {
    mapState,
    mapMutations
  } from 'vuex'
  import setBadge from '../../mixins/tabbar-badge.js'
  export default {
    data() {
      return {
        rightOptions: [{
          text: '删除', // 显示的文本内容
          style: {
            backgroundColor: '#C00000' // 按钮的背景颜色
          }
        }]
      }
    },
    mixins: [setBadge],
    computed: {
      ...mapState('m_cart', ['cart'])
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      radioChangeHandler(o) {
        // #4 调用 vuex 中修改状态的方法
        this.updateGoodsState(o)
      },
      numberChangeHandler(o) {
        this.updateGoodsCount(o)
      },
      swipeActionClickHandler(item) {
        // 调用 mutation，删除这一项
        this.removeGoodsById(item)
      }
    }
  }
</script>

<style lang="scss">
  page {
    min-height: 100%;
    background-color: #fff;
  }

  .cart-title {
    height: 80rpx;
    display: flex;
    align-items: center;
    padding-left: 12rpx;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 20rpx;
    }
  }

  page {
    height: 100%;
  }

  .cart-container {
    background-color: white;
    height: 100%;
    padding-bottom: 50px;
    box-sizing: border-box;
  }

  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;

    .empty-img {
      width: 90px;
      height: 90px;
    }

    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
